Fluid-operated tool



V`:xt ated tool wherein the^ilo\v1'o':f iluid under pressure, vfor reciprocating the plunger, is

v To' all "whomz't'may concern citizen of the United States a resident of Chicago, countyof! Cook, and j State" of Illinois, have. invented certain new. and ,useful Imi)I'ovements-v injFluid-Operated Tools, of which the following is afspeci'fica a tion.,

provide an improved fiorini; offQfl'uid-open i YI'na'nually controlled;A lto Vprovide an improvedarrangement of valve-mechanism Vfor controlling the admission of the iiuidzpressure-tothe cylinder wherein -theplunger is of the computeren.'

i mounted; and to provide-improved means for operatingsaid valve mechanism.

An .illustrative embodiment of the invention the form` of al pneumatic; rivet-cutting tool is shown in' uthe accompanying drawings-,in Which-` 1 VFigure 1 1s-a longitudinalfsectional View Fig. 211s an `enlarged 'end viewjof; the. member Whlch carmes-theyalves byjineans Y yof which theoperatingiluidiscontrolledlg that regula ted bvthe valve'mechanism mounted onone end of: the cylinder "1, it isadapted'to tool 3 'shiiitably 4,supported vin .a tool holdersecured to the other end of" Y jihecylinder l. i f

- The cylinder 1 r piece :of'sseamlessf strike. the cutting Fig.v 3 vis aperspectiveuvieWof-the lever` v. arbor, and cani' parts by whichthe shifting 'I Fig. tfis a perspectivefview of the memcoacts"`With th'ejfleve'r for actuathammer 2 is reciprocatinglymounted -so under the influenceof fluidjpressure,

preferablyv com prises` ja. tubing of the vdesired length, depending of the `piston 2.1

This tubing is;v shown vthreaded at the ends, and at oneend is con-v `nected to the head 4j, which carries thefluid pressurelegulating mechanism., and at the other end tothe toolfholder.` The piston 2 is a v cylindrical steel block, cutl awav throughout apart-of its'length so thatit has sliding ,Y contact with the cylinder only at the ends 5, and has van intermediate expansionspace topreventzlossrof pressure around the pis-L of America, and x upon the, desired throwY .ton. :As 'thepistoni isfiforcedtoWardfoneg endo'flthecylinder1',itacquire'smomentum andl-strikes-thefheadf oi`the1too l Sfvvith the1 required "forceto cut ofi' rivet heads',;'and its" -movementtoward the opposite.'V endv of the cylinderris cushioned"andarrestedby a Vspringf?. v f Y. v Thel tool holder vcomprises-a bushing-.'18 The main objects ofsthis invention are -to screwed onto the ende-ofthecylinderi,A a

means of a'l'alnge 11fclamped between the afenteufiiaii. 1 6, 192e; jeppnaion medayfz, 1.919.`-rl semaine." 294,136.1" 'f abutting shouldersof the A"lnishiitg 8 and f.

nipple 9,,fand extends a shortdistance into'V the 'endet the Vcylinder1. 'l` h i 3 ltool 3l is. slidi'n'gly mountedin the VsleevexlO,andis lV normally urged;V by a spr-ingr 1 2iuto a retracted position; LThe springvlz?v is seated in i V a-recese 13`f0rmed in thenipple '9 land bears f mounted ina Huid pressurephamben17,

formed in the head 4; VThe;:valves ,arelcon- .nected ttteetheriso`v as 'to be.,v actuated vbv a i from the fluidv pressure l chamber 17 through the ports19 and 201" .lever 1'8for .controlling communication i The 'which' carries'V the iluidqpres- Vsureregulating mechanism' is' lintheiorm of a. -cylindrical member Thaving a partitionl located-between the'ends thereof. The part atgonefside of the partition is provided' with :threads 22 by meansv of which" the VVhead is i. secured to the cylinderl. The other side 'of the'f'partition f constitutes the fluid pressure chamber 1 7, 'th- :end otgwhichisclosed by a; plate '23 secured thereto. "i :f i The port 19.isj-formed`in a'bushing 24 se- Y cured in the partition '21y and provided with fa seat25 with whichthe valve'l coacts for closing.; communication' -between the fluid .pressure chamberr 17. andthe cyli'nden 1.

The port A20- is formed in 'thefpl'atey23fiu axial alinement with thevport .19113lid like? 'Wisefis providedwith a's'eat-'QG-withf which Y f the valve 16 coacts forfclosing-communica-y Ation,between the Huid pressurefchfamber 17 and' the. other fendf of the vcylinder *1, lwith* 1 whichfsaidport is connected bythe pipe?. It will be notedthat the portQOs yconsidfics '75 betweentheend of said nmnleand an annu! f l used.. to'Y ietuinf thepiston 2, which obviouslly o is considerably less'than thativhichis required to'` give the piston the desired molet port 28 which is located.intermediate the l frThe valves '15 and i der 1.

i The cam o'lf'ithe;

of the chamba-#117 sol as topermit thev passagefoii tl'ui'daround the same to the port20. A, springl bearing between the plateif23 and; the `member 291:normal'li'vA urges the1mem ber 29- so as to seat the valve l5 and unseat the valve 16..v 1

rIlhe valve-shifting ,mechanism by which the action 'of the valves 15 and16isfcontrolled, comprises an arbor 32'ljournaled on the head il' andrcarryinzg onsite outer end the lever' 15S` and' its inner' end: a lcani shape more clearly shown in Fig; 3, and isE adapted to shift the member 29 against the action oif'the "spring 31 vvhenthe lever 18 is turnedtoone-position, andto permit the opposite shitting of themembei" under-the action` oi" the spring 31 When'the :liever is swung inV the reversel direction."

niforder to morereadily Vfacilitate'the return of thepifston 2,1 an? exhaust. o'ne'ning 345 is radially arranged in' the head^il to communicate lWith the interior oi' .the cylin- A fitting i'isfsecured ,to the head toconnect Withsaid exhaust openin and provided with a` port 36?. A nseatyf' ,formedon the tittingso Vas to coact with a valve 3S sliiitab'lv mounted` on 'pthejfitt'ing 35" 'for controlling `the exhaust trom said 'cylinder through the" port` 3G. The stem 39 ot'f the `valve-38 `is connected to a member 40 providedatfits upper endWit-li aislot il by which the' member embraces vthe f arbor andas; shdably supportedthereon. Ajshoul'- der 42is 'formed on the 'member 40" and is'` adapted to coact with a. cam orv roller` 43 on the'lea'ferlS orcausing themembei- 10 to shift thevalve ElV against the action oit the spring la ivhen the lever 18 is' turned.

The arrangement of the shoulder 42 andthe came-51 is such that the valve under the actionofthe sipringel is normally seated When` the `valve 15is open, and vice versa, when thevalvel/is seated and the' valve 16 is retracted, the valve 38 isretracted.`

This device is adapted *for use with' any `kindof `toolvvhere it is desired to` obtain intermittent blows, 'each oi' which is to Vbe under themanualcontrol of the operator, butfis particularly designed for cutting rivets? Also,1the device may be operated l 16am-rigidly secured together in axial alinement upon' a member` 29 `vvliiclris sliidablj,Y mountedrin the fluid pressure chamber 17. The: `memberf 29 f' isdisk-shaped and has Wings 30 termed thereon which space t it aivayiromf theperiphery v any fluid pressure, butfis more particustrikea blow upon `tlie toolS, the lever 1S turned to.v a positionVv substantially as shown in Figi, 12 Such turning ot the lever l18 causes the cam to retract the member- 29 against the action of the-spring 31 and to seat'thebvalve to close the.` portrQOyand Flaiid isv thereupon perniittedto pass from the chambery??V throng-lathe port 19 and has been struck, the operator ,sliitts the Athe lever 18 baclvvardliy (to ,thea-ight doavn- Wardly, with regard toFig. 1) ,Y whereupon the eamB retracted so: as to allowfthe spring lD tofshrit the member 29 "andi .un-

' larly intended toV be operated by compressed air.

:unseatithefvalve 15 to open theport 19.

seat the valve 1G so as toopenthe poi-t2() and seat'the-valve 15 for the purpose oi' closing the Yport 19. ris soon asthe lever has moved V.tar enough. townearly seat the valve 15, the cani laeting on the shol-i-lder il2 shift-sthe` member 410i and unseats the valve 38. Y'Viththe parts in this position,

l'uidV isg allowed vtov pass from the' chamber 17 through the .port 2:0 and the'pipe 27, into the cylinder 1 at theVA lower Vend thereof.

Thereupon the piston 2 is forced upwardly and the .fluid in advance thereof is exhausted Vthrough. the ports Se and 316. VWhen itis-desired td'sftrike theftoolanother blow, thelever-lS is .ehiftedso'as'to afrain. sea-t the valve 1Gv and unseat thev valve 1o, whereupon the action previously described is repeated.

Although but `onefspeciie embodiment of` this invention hasfbeenherein 'shown and described, it ivillbe:'understo'od that nuerous details of the construction shown may be altered ormitted Without departing from the spirit 'of' this invention as defined by the following"v claims. Iclai'm;f "i s l 1. .In a tool"`of"tl1efclass described, the Combination of a cylinder, afpistonreeipro- "catingly mounted therein7 a tool supported `at one end oisaid cylinder, a valve head rovidinflr a fluid )ressure chamber havin b A C Aports communicating 'with Vrespectively op posite'endsoi said cylinder,- a valve for [each of .sa-id ports,A means'rigidlyconnecting 'said valves, an arbortjournaled on said head, `a camsecured to said Varborand engaging said means, and a lever connected to' said .arbor for rotating the same so as to cause said cam toshift said means whereby said valves are simultaneously actuated for alternately opening communication from said chamber through said ports to opposite sides of said piston.

2. In a' tool offthe class described, the

iso l cause thepiston 2 tar-nove toward thetoolv, strikingit uponithe head 6%. #After the blow T Y combination of a cylinderaavpiston-reciprox-Vcatinglylinountedtherein,

tool supported catinglyfmountedftherein, atechsupported atfone end Aof said-cylinder, valve head l at one end ofwsaijd 'cylinder, a valve head vproviding a Huid pressure chamber having .v n A secured to the otherendof said cylinder "and portsl communicating with respectively op- `50 *having a fluid:v pressure,`r chamber formed posite'ends fof said cylinder, valve mechatherein, 'saidhead having a radially dis-.v nism 'controlling said ports, a; lever con-f -PSed 1Inlet fel adllitt'llg fluid'V under presf nectedntok said valve echanism for shifting sure to said chamber and having axially., thesameso as to alternately open communi.. disposed ports located on"`o"pos1te sideso'fl cation 'frornlsaidV chamber through Said 5 5 said inlet, a member shifta ly mountedvlin' ports to opposite sides offsaid piston, said 'f said chamber.y `valvessecuredy to. opposlte cylinder having an exhaust port arranged sides of said member and adaptedztdseat adjacentV -to and communicatingrvvith one,- respectively in Seid POI'S, M1 211400110111 'endthereona valve yfor eont-rollmgsaldrex# vfnaled on said head, a camV secured, to said haust port, la slotted member'embraoing said 60 arbor. andfadapted Vto `engage saidmembel` arbor and shiftably, mounted thereonl fand for shifting the same, and a leverconneted connected to saidl exhaust valve, a shoulder tosaid arbor ffor rotatmgy the same solas onqsaid member, and a cam on VVsaidflever.

, tolcause the shifting of saidV member vWhere-i l adapted to engage saidV shoulder for. causing; l' .by Said valves are slmultaneously'actuated, said member ytoshift Vsaid exhaust valve"6`5 so'V as to alternately open communication simul;aneouslyy "with" the -shiftingjo'f said yfrom said chamber through -said.portsgto notherivalves.

oppositefsides of said piston. ,y l j 5.` Ina tool of thel class described, the *A 3.1111 a tool `of the class-described, fthe Vcombination of a cylinder, apistonvreciprocombination of a cylinder, a lpiston' reciprof "rcatingly mounted therein, a tool rsupported 70`- catingly mounted therein, atool supportedy ati one end of saidcylinder, a valve head` at one end of 'said cylinder, ra valvehead secured to oneendofsaid-cylinderandpro. Y i providing a fluid pressure chamber hav1ng,.-viding auid pressure-chamber therein hav- -p01`$ Cenllllmeiting With .respectively Op-l` ing'ports communicating vvvith respectivelyV posite ends of said cylinder, valve mecha opposite ends of-'said cylinder, a valve con-,V75 y nismcontrolling said ports, a lever con-V trolling each of said' ports, a member shift-'1 nected to said valve mechanism for shifting" ably ,mounted insaid chamber'and rigidly the Sallie S0 as to alternately opencomlnuni-V connecting ysaidV valvesftand a nspring norl ,cation from said. ports to opposite sldes of saldplston, said said valves to close itsrespective'port and. 80'` chamberthroughfsaidi 'mally'urging saidrrmemberlto cause' onerolc l cylinder having anexhausb port arranged the other valve to open its-frespective vport,. gvl` f v adjacent Yto andVv COIIllIlllnlCatlng with onefA an'arborjournaled-on said head, a cam coni end thereof, a valve for controlling,v said `nectedto said arbor and-engaging said mem-v exhaust port, a member shiftably mounted' ber, andra lever connectedtoyV said arbor for Y f Y adjacent to saidk lever andconnected to said rotatingrthe same lsoa-s tox'cause said cam '8,5 y

f exhaust valve, alshoulder on said member, toshift said membervvherebylsaid one valve;

if and a cam on saidlever ladapted to .engage is retracted to Vopenits respective portl andV lsaid shoulder for causing fsaid member to vvthe other valve -is shifted to closeV its respecl Y shift said exhaustvalve simultaneously with' tiveport;

the shifting of said other valves.

f 4,111 a, i001 of the dass described, thefpfpnprii, 1919.

combination :of a cylinder, a piston,recipro` Y i V HARRY R.

signed at Whiting, Indiana, thiszeul dayfso( i' 

